Portable protective chamber for arc welders



Aug. 6, 1 4 J. R. HERRADORA PORTABLE PROTECTIVE CHAMBER FOR ARC WELDERS Filed Aug. 2, 1938 2 Sheets-Sheet 1 INVENTOR Ju/m/ EAFAEL Haze/mom ATTORNEY-S 6, 1940- J. R. HERRADORA 2.210370 PORTABLE PROTECTIVE CHAMBER FOR ARC WELDERS Filed Aug. 2, 1938 2 Sheets-Sheet 2 Patented Aug. 6, 1940 PATENT PGRTABLE iPRfiTECTWE CHAMBER. FOR ARC WELDERS Juan Rafael Herr-adore, Jersey City, N. 3. Application August 2, 3338, Serial No. 222,579

5 Claims.

It is well known that electric arc welding involves certain hazards to the operator due to inhalation of noxious gases produced by the high temperature of the arc, irradiations such as ultra- 5 violet and infra-red rays, also metals in finely divided particles, and fumes, which in certain proportions may eventually lead to pathological changes of a serious character in the lungs.

The purpose of this invention is to eliminate fill these hazards and do away with the use of cumbersome and uncomfortable protective devices such as masks, respirators, goggles, etc.

This invention substantially consists of a portable chamber provided with a handle, which comld pletely encloses the electric arc, e'mployed'in conjunction with a suction mechanism to draw and carry away the noxious gases, emanations and dust out of the working space or room. This chamber has a telescopic extension carrying a 0 sliding window of black or other colored glass which is opaque to visually harmful radiations from the arc.

The chamber has one or more orificesior the insertion of the welding electrode and is fitted as with a rotary-or swiveling connection for a tube leading to a suction mechanism for election of the gases, fumes and dust resulting lrom the welding process.

Elie chamber is made of opa ue, light weight,

heat-resisting and dielectric material, such Bakelite-etc.

The operator holds the electrode as usual in his right hand, the chamber in his left hand, insoles the welding wire through the orifices of the 35 chamber and observes the work through the colored glass, The chamber may also he permanently attached to the electrode holder to per mit operation with a single hand.

Embodiments of the invention are shown in 4n the accompanying drawings, in which:

a piece of work having parts disposed at an angle to one another. to Figure 8 is a side elevation, on a smaller scale,

"to the extension and flow therealong and thereby (Ci. ZIPS-=8) of a further modification, in which the welding rod holder is connected to the chambered struc= ture.

In these drawings, the chambered structure i has one or more orifices 2c, the orifices osing 5, provided with closure members 2 so that all of the openings except the one in prevailing employment may be sealed; These orifices are utilized for the insertion of the welding wire so that. the wire may he brought into its operating posl= 110 tion at or adjacent the welding point. A rotary connection l is provided the top of the struc= ture in Figures 1 to 3, for r ceiving the exhaust tube 5 which is extended to a suitable for withdrawing air from the chamber, along with it n XiOllS gases, dust, etc. The chambered strum ture has a telescopic structure including the piece 6, an intermediate section Sc and a sec tion which is secured to the chambered structure i. The sections 6c. and are connected go together by a hinge so that the end portion of the extension may he moved to difi'erent being held thereat by the iricticn between parts. Similarly, the end portion 6 or the telescepic extension has a slot lie for receiving a stop pin ll mounted on the intermediate section to, where oy the telescopic movement and controlled. At the en this extension, is provided a @c for holding hlac through which ch-serv the work hens done.

The extension is provided with apertures l through which the air may enter the extension and allow therealong toward the interior of the so chamhered structure i. it is preferred to have these apertures located at the lower side of the extension, and preferably near the inspection window 8, so that the suction produced through discharge conduit 5 will cause air to move LL 1mprevent the collection of dust, etc., on the inner face of the inspection window 6.

in the form of construction shown in Figures and 5, two pieces of metal may be welded, the ,5 pieces being located in a horizontal or a vertical plane. For such conditions, the telescopic eaten sion and the suction connection may he located at difierent parts of the chambered structure l in order to facilitate observation of the 50 work. In Figure 4, the regular electrode holder is is illustratively shown engaged with the weld-'- ing rod or wire 3.

In Figures 6 and '7, further modifications have been made in the chambered structure, to adapt 66 outside angle. "In each case, the chambered struc-,

ture I has a wall provided with the hinged members it which may be moved to position and close engagement with the exposed faces of the work.

In Figure 8, the chamber is soiidily attached to the electrode holder it by a connecting it, so that the device may be positioned and held by the same hand which supports and guides the electrode rod or wire itself. The spring and lever attachment it is properly positioned for feeding the weld wire through the wall of the chambered structure 9, as required by the necessities of the work.

What I claim is:

l. A portable protective device for welders, comprising a chambered structure for enclosing the welding point and having an opening therein through which the work is exposed to the interior oi the structure and being at least in part of electrically insulating material and having a further opening through said electrically-insulating material, said further opening permitting the insertion of a welding rod so that the inner end of the welding rod may be operatively positioned at and adjacent the welding point, a holder for the welding rod connected to and forming a handle for the portable device, a connection to means through which gas d particles may be drawn ad from the interior, of the structure, and a hollow extension from the structure and provided at its inner end with an inspection window, said extension having an aperture therein for the flow of air inwardly through the aperture and opposite the said window so that the admitted air is eifective for removing dust and particles from said extension into the interior of the structure. v

2. A portable protective device ior' welders, comprising a'chambered structure for enclosing the welding point and having an. opening therein through which the work is exposed to the interior aaiosvo oi the structure, said chambered structure being at least in put of electrically-sting terial and comprising arly telescoping parts adiacent'the opening therein whereby the structure will fit tightly against a piece oi wcrh and permit operation on parts at an le to one another, one of said telescoping parts having a further opening through the electricallyinsulating material for permitting the rtion oi a welding rod so that the innerend of the welding rod may be operatively positioned at and I 3. A portable protective device for welders, as

claimed in claim 2, wherein a holder is provided for the welding rod, said holder being connected to and forming a handle for manipulation of the portable device.

4. A portable protective device for welders, as

' claimed in claim 2, wherein the said hollow extension is formed in two parts which are hinged with respect to one another for permitting angular positioning of said window.

5. A portable protective device for welders,

as claimed in claim 2, wherein a plurality of openings are provided for insertion of the welding rod, said openings being located at various parts 

